package com.study.jdk.concurrent;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * Description:
 * User: 27010
 * DateTime: 2018/2/11 20:41
 */
public class Test {
    public static void main(String[] args) {
        Map concurrentHashMap = new ConcurrentHashMap();
        concurrentHashMap.remove("1");

        Lock lock = new ReentrantLock();

        lock.lock();
    }
}
